Decorative windmill



FIG. 1 is a front perspective view of a decorative windmill showing mynew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view of the decorative windmill shown inFIG. 1; and,

FIG. 4 is a side elevational view of the decorative windmill shown inFIG. 1.

The ornamental design for a decorative windmill, as shown and described. 